Sold and Installed only by plumbing professionals--------------------------------------------------------------------------------Available Capacities:30, 40, 50, 65, and 80 gallonAvailable Warranties:8-year limited tank and parts warranty with a professional installation: With ProtectionPlus the 8-year limited tank warranty becomes 12 year!--------------------------------------------------------------------------------Features:Brass drain valve Stainless steel lower heating element EverKleen self cleaning device Premium grade anode rod Temperature and pressure relief valve included Exclusive Rheemglas ® tank lining resists corrosion and prolongs tank life Isolated tank design reduces conductive heat loss Electric junction box located above heating elements for easy installation Over-temperature protector cuts off power in excess temperature situations Automatic thermostat keeps water at desired temperature Compliant with many electric utility incentive programs